Hopper feeding device



Dec. 16, 1930. E. HJHUMBERSTONQE ETAL 1,735,535

HOPPER FEEDING DEVICE Filed Dec. 23, 1926 v [Ill/Ill!!! 60 f INVENTOR. a1 51:44,.

ATTORNEY.

I ERNEST H. HUIJIBERSTONE AND HARRY R. WELCH, OF COLUMBUS, OHIO,ASSIGNORS.

P tented Dec. 16, 1930- i" STATES PATENT oFFlcE TO THE MARBLE CLIFFQUARRIES COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO j HOPPERFEEDING .nnvrcn j Application filed December 23, 1926. Serial No.156,701.

devices, particularly of the rotary type.

In the art the use of hopper feeding.

' devices consisting of a cylindrical casing within which a shaft havingcompartment pockets formed as segments of the cylindrical casing, areold and well known. Our invention employs as a mechanical feeder arotary shaft carrying a set of segment shaped compartments, each one ofwhich feeds material from a receiving side of a casing to adischarge-side. The improvements which we have made relate more to theclearance which is provided in the casing, to the method of regulatingthe flow of material to the rotary feeder, and to the position intowhich the material to be fed is exposed to the compartment pockets, thanto any invention inherent in the shapeof the rotary feeder.

It is the object of our invention to provide, for conducting suchmaterials, as

' crushed stone, lime, ore and other kinds of powdered, granulated orsemi-plastic material, a leak-proof feeding device which willeffectively resist blocking by nails, spikes and other foreignmaterial'which we have found to be a constant source of trouble withother types of feeders. I

Referringto the drawings in which we have illustrated a preferredassembly Figure 1 is a side elevation of the feeder.

Figure 2 is an end elevation of the assem- V bly shown 1n Flgure 1.

Figure 3 is a perspective view of the internal compartment feeder.

v Figure 4,113 a sectional view taken along the lines 1-4 in Figure 1.'V

The casing which is generally indicated at 40 1 may be of desired shape,providing it has a compartment such as is indicated at 2 therein. Thecasing which'we have shown has a flanged portion 3 for attachment to afeeding chute, and a flanged portion 4 for attachment 4:, to a deliverychute. The casing has side walls 5 which we have shown with orifices 6over which plates 7 may be riveted or welded. The plates 7 arepreferably mounted on the outside of the side walls 5, so that anannular 59 recess is provided for housing the rotary feedingdevice. Thefeeding device is composed of. a central rotatable axial shaft 8 whichmay be'squared to engage a squared orifice 9 extending through therotor. The rotor has a central hub'portion 10 with disclike sidesllwhich fit within the recess in the casing, so that no capacity of thecompartment pockets12 will be wasted, and so that there WillbG noopportunity for leakage, and so that no annular spaceswill be formedwhich would be likelyto trap foreign matter passing through the feeder,and thus block its operation. Blades 18 extending radially from thecentral hub, form the compartment pockets.

The rotor vanes 13 are of such length that a very small opening 1a isleft between the outeredge of each blade and the bottom wall 20 of thecompartment 2. The casing at the top; however, provides considerableclearance, so that material carried in the'po'ckets is not likely tostrike the upper wall of the ca sing: In order to better illustrate theprinciple involved, we have shown an opening 15 in the top wall of thecasing. \Ve will ordinarily provide a cover for this opening, but such acover is not essential to the operation of the feeder. Extendingpreferably in approximately the position shown in Figure 1, we haveindicated a deflecting plate 16 which may be moved laterally into thelower compartment 2.

In Figure 1 we have indicated the position in which crushed stone orlime will appear in thefeeder casing. We have indicated the compartmentsof the feeder by the letters a, b, c, and d respectively, beginning atthe start of the filling operation. The direction of rotation of thefeeder is counterclockwise.

The compartment 64 will not fill during its first quarter revolution,the material being compartment (1 is empty having discharged its load-bygravity into the discharge portion of the casing. I 1 V a While we haveshown a, rotor havlng four compartments, it will be immaterial if a vgreater or lesser number of compartments is PIOVldEd; In some feeders ofthe same general type, it is possible to regulate the amount 7 therotor. In our novel type the capacity can fed by the capacity of thecompartment,jas

the feeder is limited bythe uppercasing wall,

making a fairly tight oint with the vanes of be controlled by measuring;or weighing the amount which comes over 1n each compartmentwith the gate"at a certain position.

Then by jcalibrating'the gate-as indicated at 16a, a measured quantitymaybe fed, depend the supply H heldfback by the gate 16.

ing somewhat on the column 'of Having thus described our invention, whatis 7 we clalm as new and desire to secure by LettersPatent, is If i y AA feeding device comprising a casing with offset side walls for seatingthe sides of a q feeding device, and a feeding device rotatably mountedin said casing, said device having-disc-like sides with a hub extendingacross between said sides, and vanes extend-j ing radially'from said hubsubdividing said v device into feeding compartments, said disc-.

like sides "extending into said offset side ,wall's, and said casingforming a seal against the outer edges of vanes in the lowermostposition thereof, and having clearance at: the

uppermostposition of the vanes, and a plate 7 extending diagonally intosaid casing tangentially to the periphery of said disc-like sides fordiverting material from a direct gravity drop into said compartments,said plate being extendible to carry material within said'casing andinto a compartment therein having 7 a bottom extending substantially in-hori-.

zontal alignment with the lowermost portion of said feeding device.

ERNEST H. UHUMBERSTONEV; HARRY R. WELOH. 7

